Pyplot is MatplotlibPlottingPyplota collection of command-style functions that make Matplotlib work like MATLAB. Each pyplot function makes some change to a figure: e.g., creates a figure, creates a plotting area in a figure, plots lines in a plotting area, adds labels (text) to the plot itself or to the horizontal and vertical axes of the figure, ... Successive calls to different pyplot functions preserve what done in the figure by the previously called functions, so that the complete figure can be drawn in successive steps.